BRICK ARCH SEWER REHABILITATION
AT A GLANCE
• Residential and Commercial Areas
• Sewer Overflow
• Structural Reinforcement
• Tunnel Floor Rebuild
• Varying Sewer Dimensions
The City of Effingham, Illinois had a severely deteriorated large-diameter arch brick sewer that was over 100 years old. The shape and size of the brick arch changed approximately 25 times throughout the 2,100-foot alignment.
Initial inspection revealed the portions underneath two residential structures and one commercial structure needed structural reinforcement due to missing bricks and the condition of those remaining. The sewer was also a source of infiltration and contributed to combined sewer overﬂows for the city.
Due to the ﬂuctuating dimensions and cross-sections of the sewer, specific rehabilitation methods were not feasible. Replacement or relocation was too costly. The team selected Warren Environmental’s (Warren) epoxy coating system as the preferred option. The system’s ability to improve the structural integrity of the brick arch, encapsulate the interior to eliminate inﬁltration, and provide a barrier against further corrosion, made it the perfect solution for the City.
In the course of inspecting the sewer, A&W Coatings determined that a large portion of the tunnel ﬂoor was missing and had to be rebuilt. A&W created the new floor by laying a foundation of stone and rebar embedded with Warren’s epoxy.